C. In Exhibit C, a new Part 5 is added after the current Part 4, as
 follows:

 "5. INSTALLATION AND COST AMORTIZATION OF WINGLETS:

 Notwithstanding any provision of the Lease to the contrary,
 Lessor will reimburse Lessee, Lessee's actual cost of installing
 winglets on the


 2



 Aircraft ("Winglets Actual Cost") up to a maximum of \*\*Material
 Redacted\*\*, provided such installation occurs no later than April
 2004. Each monthly installment of Basic Rent will be increased by
 \*\*Material Redacted\*\* of the Winglets Actual Cost commencing on
 the first Basic Rent Payment Date following winglet installation.
 Upon installation, such winglets shall become a part of the
 Aircraft and title thereto shall vest in Owner in accordance with
 Section 9 (b) of the Lease."

 D. In Exhibit C, a new Part 6 is added after the new Part 5, as follows:

 "6. INSTALLATION AND COST AMORTIZATION OF ADDITIONAL MODIFICATIONS:

 Notwithstanding any provision of the Lease to the contrary,
 Lessor will reimburse Lessee, Lessee's actual cost of installing
 on the Aircraft up to an aggregate maximum (for all
 installations) of \*\*Material Redacted\*\* ("Additional
 Modifications Actual Cost") the following additional
 modifications:

 (I) ACARS: Installation of upgrade from single ARINC 724B
 Rockwell ACARS Management Unit,

 (II) ISFD: Integrated Standby Flight Display, provided that such
 retrofit allows for the restoration of the original units
 back onto the Aircraft,

 (III) FULL FACE OXYGEN MASKS, and

 (IV) VSD: Vertical Situation Display;